Battle of the Budget .50 BMG Rifles; also .50 BMG OpticsThe .50 BMG cartridge is most well-known for its use in the M2 Browning . AR- 15 lower receiver, fire control group, grip, and stock, and provide a .50 BMG top end, . U.S. Optics is known for producing custom high-end rifle scopes, and many .http://demigodllc.com/articles/battle-of-the-budget-50-bmg-rifles/

Custom ActionsReceivers for custom guns and gunsmiths. . Custom actions start at around $750 and can cost three times that amount for the jumbo 50 BMG actions. Why is a .http://www.6mmbr.com/actions.html